PMID- 3630726
OWN - NLM
STAT- MEDLINE
DCOM- 19870929
LR  - 20131121
IS  - 0001-6772 (Print)
IS  - 0001-6772 (Linking)
VI  - 130
IP  - 3
DP  - 1987 Jul
TI  - Repeated isokinetic plantar flexions at different angular velocities.
PG  - 495-500
AB  - Peak torque (PT), contraction work (CW) and mean power (CP) were measured for 
      each of 200 repetitive isokinetic (maximum effort) plantar flexions. Simultaneous 
      recording of integrated electromyograms (iEMG) were obtained from the three parts 
      of the triceps surae muscle. Four tests at different angular velocities (30, 60, 
      120 and 180 degrees s-1 (degrees X s-1] were performed with at least 2 weeks 
      between each test. The subjects were eight clinically healthy females (24-36 
      years). At all four angular velocities CW, CP and PT decreased steeply during the 
      first approximately 70 contractions, followed by a steady-state level with no 
      further significant decreases. The relative decreases of PT and CP were 
      significantly smaller than for CW at all velocities. The relative CW decline 
      increased with angular velocity; the relative PT and CP decreases were not 
      velocity dependent. Also iEMG activity decreased in two phases during the 200 
      contractions and were on a significantly lower relative level at 180 degrees X 
      s-1. However the reduction of range of motion was significantly greater at 180 
      degrees X s-1 and when the iEMG activity was compensated for this decrease the 
      relative decreases in electromyographic activity were similar at the four angular 
      velocities. The results indicated that CW was more sensitive to fatigue than PT 
      and CP and that CW fatigue was dependent on angular velocity.
FAU - Gerdle, B
AU  - Gerdle B
FAU - Langstrom, M
AU  - Langstrom M
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Acta Physiol Scand
JT  - Acta physiologica Scandinavica
JID - 0370362
SB  - IM
MH  - Adult
MH  - Biomechanical Phenomena
MH  - Electromyography
MH  - Female
MH  - Foot/*physiology
MH  - Humans
MH  - Leg/physiology
MH  - *Muscle Contraction
MH  - Muscles/*physiology
MH  - Physical Endurance
EDAT- 1987/07/01 00:00
MHDA- 1987/07/01 00:01
CRDT- 1987/07/01 00:00
PHST- 1987/07/01 00:00 [pubmed]
PHST- 1987/07/01 00:01 [medline]
PHST- 1987/07/01 00:00 [entrez]
AID - 10.1111/j.1748-1716.1987.tb08167.x [doi]
PST - ppublish
SO  - Acta Physiol Scand. 1987 Jul;130(3):495-500. doi: 
      10.1111/j.1748-1716.1987.tb08167.x.